Seven Democratic lawmakers in Texas are pressing Tesla to hold off on deploying its fleet of autonomous robotaxis in Austin, just days ahead of the company’s anticipated launch. The appeal comes amid growing concern about public safety and regulatory readiness as driverless vehicles prepare to hit the roads.

Tesla stock was down Friday, the last trading day before the company’s expected robotaxi launch, as Texas Democrats tried to get CEO Elon Musk to delay the start of its service. Shares of the electric vehicle maker were down 0.

Tesla has sent out invitations to a small group of people to join the limited test of its robotaxi service in Austin, Texas, which is tentatively set to start on Sunday, according to posts and email screenshots on social media.